| Customization: | Available |
|---|---|
| Type: | Round |
| Standard: | ASTM |
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ALLOY 800 series of alloys, invented by the Special Metals Corporation Group of Companies, is the result of years of monitoring
Alloy 825 (UNS N08825/W.Nr. 2.4858) is a nickel-iron-chromium alloy with additions of molybdenum, copper, and titanium. The alloy's chemical composition, given in Table 1, is designed to provide exceptional resistance to many corrosive environments. The nickel content is sufficient for resistance to chloride-ion stress-corrosion cracking. The nickel, in conjunction with the molybdenum and copper, also gives outstanding resistance to reducing environments such as those containing sulfuric and phosphoric acids. The molybdenum also aids resistance to pitting and crevice corrosion. The alloy's chromium content confers resistance to a variety of oxidizing substances such as oxidizing salt. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against sensitization to intergranular corrosion.
FEATURES
Alloy 825 has excellent resistance to chloride-ion-induced stress corrosion cracking, reducing environments containing phosphoric and sulfuric acids, oxidizing environments containing and nitrates, and pitting, crevice corrosion and intergranular corrosion. It has good mechanical properties at cryogenic temperatures to moderately high temperatures up to 538ºC.
APPLICATIONS
Chemical process industry, acid production, pickling equipment, pollution control equipment.
| CHEMICAL COMPOSITION | ||||||||||||||||||||
| % | Ni | Cr | C | Mn | Fe | Si | Cu | Mo | Ai | Ti | S | |||||||||
| MIN MAX |
38.0 | 19.5 | - | - | 22.0 | - | 1.5 | 2.5 | - | 0.60 | - | |||||||||
| 46.0 | 23.5 | 0.05 | 1.00 | - | 0.50 | 3.0 | 3.5 | 0.20 | 1.20 | 0.030 | ||||||||||
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